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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Here I go: A prediction model for e-bike and e-scooter positioning inside a CCAM environment

Croall, Ruben, Jonsson Lundqvist, Douglas January 2024 (has links)
This thesis presents a prediction model for e-bikes and e-scooters, aimed at enhancing traffic safety and efficiency by sharing their intentions of future possible positions among road users. The research addresses the current automated vehicle technologies which lack communication between road users. The prediction model is based on and tested with a mobility model, adapted for modelling e-bikes and e-scooters in a simulator program primarily used for pedestrians. This implementation has produced the ability to predict future positions and further the development of intention-sharing capabilities in urban traffic scenarios. The model is built upon physical parameters and mathematical models for a controlled and regulated model. Polynomial regression was applied to predict positions based on historical data and the results were evaluated with RMSE metrics, demonstrating the prediction accuracy in different scenarios. The thesis also includes the integration of the prediction model into a hardware setup, a Raspberry Pi. Demonstrating the practical application and retaining the effectiveness of the model in a real-time environment. Gathered from the results, the model can reserve a predicted area every second but also has the capability to work during faster or slower time intervals, depending on the hardware used to enable the model in the protocol. With this, the research highlights the possibility of implementing this in CCAM systems. The results show promising accuracy with a simple controlled model using as little necessary data as possible. The project work contributes to the field of intelligent transport systems by providing a scalable solution to enhance the interaction between VRUs and vehicles, creating a step closer to achieving the Vision-Zero goal of having zero traffic-related accidents or fatalities.
2

V2X Intention Sharing for E-bikes and E-scooters : Design and implementation of a vehicular network protocol for Vulnerable Road Users intention sharing.

Elfing, Johan, Pålsson, Joel January 2024 (has links)
Despite a steady decrease in fatality rates across European nations,Vulnerable Road User (VRU) continue to face significant risks in traffic incidents. Pedestrians, cyclists, and motorcyclists make up the majority of fatalities. Vision Zero sets a global standard for road safety,and its implementation complements broader European Union (EU)initiatives in prioritizing a zero-tolerance stance on road fatalities.This thesis underscores the transformative potential of VehicularAd hoc Networks (VANETs) by introducing a protocol to enhance roadsafety through intention sharing, particularly for micro-mobility vehicles such as E-bikes and E-scooters. By integrating this protocolwith Vehicle-to-Anything (V2X) technology, this thesis aims to redefine VRUs’ role in traffic safety from passive to active participants. Theprotocol aims to complement the quality of information and improving energy efficiency while maintaining safety metrics for cooperativetransportation systems. We achieved this by transmitting a reservedarea where the rider intends to be in the near future.Results from simulations demonstrate the efficacy of intention sharing in improving message reliability and efficiency compared to intention detection methods.While preliminary results show promise, further research is necessary to validate real-world applicability fully. Nonetheless, this thesiscontributes to the ongoing efforts to achieve Vision Zero by harnessing technological innovations to protect VRUs and create safer roadenvironments. / Trots en minskning av antalet dödsolyckor i europeiska länder fortsätter oskyddade trafikanter (VRU:er) att möta risker i trafiken. Fotgängare, cyklister och motorcyklister utgör majoriteten av dödsfall. Nollvisionen sätter en global standard för trafiksäkerhet, och dess implementering kompletterar bredare EU-initiativ som prioriterar nolltolerans mot dödsfall i trafiken. Denna avhandling understryker den transformativa potentialen hos Fordons ad-hoc-nätverk (VANETs) genom att introducera ett protokoll för att förbättra trafiksäkerheten genom delning av avsikter, särskilt för mikromobilitetsfordon såsom elcyklar och elsparkcyklar. Genom att integrera detta protokoll med Fordon till allt (V2X)-teknologi strävar detta arbete mot att omdefiniera VRU:ers roll i trafiksäkerhet från passiva till aktiva deltagare. Protokollet fungerar som så att den skickar meddelanden för VRU:ers intentioner till de andra deltagarna inom nätverket. Dessa meddelanden innehåller de framtida förutsägbara positionerna av VRU:n. Dessa positioner är sedan transformerade till en reserverad ellips där VRU:n kan tänkas befinna sig i framtiden.  Resultat från simuleringar visar effektiviteten i metoder som genom att dela avsikter förbättrar meddelandens pålitlighet och effektivitet i jämförelse med metoder som istället försöker detektera avsikter, vilket banar väg för säkrare transportsystem.  Det visade sig att tillförlitligheten bland meddelanden med intentioner var högre, störst skillnad var inom 100 meter från avsändaren. I denna grupp hade detekteringsmetoden en förlust av meddelanden på ungefär 20%, medans intentionsdelning endast hade en förlust på 5%. Dessutom var meddelandestorleken betydligt mindre, en minsking på 64%. De preliminära resultaten ser lovande ut, men vidare forskning är nödvändig för att fullt utvärdera den verkliga tillämpbarheten. Denna masteruppsats bidrar till den pågående eftersträvan att uppnå nollvisionen genom att utnyttja teknologiska innovationer för att skydda VRU:er genom samarbete och att skapa en säkrare trafikmiljö. Dessa resultat har potential att påverka standardiseringen på europeisk nivå och bana väg för framtidens mobilitet. / Trafikverket Skyltfonden 2023/104170

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